Often you can find a great bargin at a surplus store or at a flea market on un-marked zener diodes. This device here will not only test for good diodes but will tell you the zener voltage of that diode.

Zener diodes are used as voltage regulators and will begin to conduct in the reverse or "breakdown" mode when enough voltage is applied. This voltage will remain constant or "regulated".

To use this tester, supply enough voltage from a battery or power supply that will cause the highest voltage zener you might have to operate. If you might have some 24 or 48 volt types then you need that voltage as a minimum.

I use 12 volts on mine since most of the diodes I use operate below that voltage. Next turn the pot all the way down (zero volts).

Attatch the diode and begin to increase the voltage. Watch the meter and when it stops going any higher you have reached the "zener point" for that diode.

Now, just read the voltage on the meter and mark the diode. If the meter does not read as you increase voltage, try reversing the diode.

If that dosent work you have a shorted diode or it's not a zener diode.

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Government Surplus Auctions


Looking For Electronic Equipment or Parts
At Surplus Bargains?

Government Surplus Auctions are an amazing source of cheap parts and good equipment! You might even find that car you always wanted for next to nothing! Get their list of auctions for your area.

Government Surplus Auctions

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A Little Off The Subject Of Basic Electronics...

This is a little off the subject, but if you have ever heard of Nikola Tesla you might know about his involvement with alternating current and his battles with the Edison Company, later to become General Electric, which at the time, late 1890's, was building direct current motors and generators.

Anyway, Tesla has been sort of labeled as a "weird inventor scientist" but as it turns out many of his ideas hold water today!



Nikola Tesla And The Mysterious Tesla Inventions
Find out what we now know about this effect and the old wizard scientist himself.


My book about Nikola Tesla is now available at Amazon Books

Borrow this book for free, with no due dates,
if you are a Kindle owner and Prime member.

This is a quick review about a misunderstood scientist, a man never credited with inventions we use everyday. A man who was a victim of smear campaigns ran by the big corporations of the time. A man who cared about helping people.

Wireless Electricity - The Mysterious Tesla Effect

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FREE Basic Electronic
Article Downloads...


Get all the free reports here
Basic Electronic Library And Bookstore

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New Basic Electronics Tutorial Package

How To Learn Basic Electronics And Basic Electronic Circuits At Home

Learning more about electronics is made easy and fun with my new inexpensive basic electronics home course. Not only will you find out more about capacitors and inductors, but also resistors, then alternating current which leads you to transformers. Next comes impeadance and then semiconductors, transistors, diodes and more. Sounds complicated? It's NOT! I make sure it's both easy and simple to understand. The last part includes basic electronic projects, where you use what you learned by building simple circuits. Basic Electronics Course

Find out for yourself how simple and easy I have made it for you to learn basic electronics.

Learn Basic Electronics And Basic Electronic Circuits At Home

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Three Hard To Find Electronic Testing And Repair Books
By Electronics Expert J. Yong

Click on the covers for more information on these electronic repair books by Justine Yong.

Over time this collection of repair articles
could save you hundreds of hours of pulling
your hair out trying to find a tough problem!

Electronic Trouble Shooting Articles

Testing components properly is an essential
electronic skill. A sensitive FET or a
microwave mixer diode can be easily
damaged by an ohm meter.

How To Test Electronic Components

How would you go about finding the value of
a burnt resistor without a schematic diagram?

Find Burnt Resistor Values Without A Schematic

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The Sun's Energy Is The Most Abundant
FREE Power Source Available on Earth
Build Your Own Solar Panel And Use This Free Energy

Easy Science Projects



24 Hour Science Projects

If you have been looking for a great but easy to do science project, then here it is.

You'll get online project guides with step by step instructions, easy to find supplies, references, charts and graphs!

Make your child's next science project and your child the talk of the school using "24 Hour Science Projects"!

In the United States, science fairs first became popular in the early 1950s and they have been going strong ever since.

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Wait... IF YOU ARE INTERESTED IN ENERGY FROM THE SUN,
YOU SHOULD KNOW ABOUT THIS

----HERE IS SOMETHING THAT COULD BE BETTER THAN SOLAR PANELS----

"The Stirling Heat Engine"

The Stirling engine or "hot air engine" was invented and patented by Robert Stirling in 1816 and used back then for pumping water. Today with a parabolic reflector to focus sunlight, these engines, running a car alternator, can produce large amounts of electricity from sunlight and produce zero emissions.


You could very easily build one of these yourself and all the materials needed are obtainable at your local hardware store.

Watt for watt this can be a lot less expensive than solar cells.

Get More On The Forgotten Heat Engine Click Here

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